Child booster seat



FIG. 1 is a perspective view of a child booster seat;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right elevation view thereof, the left elevation view being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines represent unclaimed matter and form no part of the claimed design. 

CLAIM The ornamental design for a child booster seat, as shown and described. 